No. 862 is a gas-heated 2000˚F furnace used for preheating molds. It has workspace dimensions of 36 inches wide x 48 inches deep x 36 inches high. No. 862 has 7-inch-thick insulated walls comprised of 5 inches of 2300˚F ceramic fiber and 2 inches of block insulation; the 7-inch floor insulation contains 4 ½ inches of 2300˚F firebrick and 2 ½ inches of block insulation. Controls include an automatic door switch to drive burners to low fire when the door is opened and an air-operated vertical lift door.
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